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Finding the Fourth Proportional to 1,764.67, 2,646.62 and 723.65

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Solution

The fourth proportional to 1,764.67, 2,646.62 and 723.65 is: 1,085.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.67 : 2,646.62 = 723.65 : x
  2. Step 2: Convert to fraction form
    1,764.67/2,646.62 = 723.65/x
  3. Step 3: Cross multiply
    1,764.67x = 2,646.62 × 723.65
  4. Step 4: Simplify right side
    1,764.67x = 1,915,226.56
  5. Step 5: Solve for x
    x = 1,915,226.56/1,764.67
  6. Step 6: Final answer
    x = 1,085.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.